Arm extension board for exercising a disabled limb



FIG. 1 is a top perspective view of an arm extension board for exercising a disabled limb, showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for an arm extension board for exercising a disabled limb, as shown and described. 